/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.solr.handler;

import org.apache.solr.common.params.SolrParams;
import org.apache.solr.common.util.NamedList;
import org.apache.solr.common.util.XMLErrorLogger;
import org.apache.solr.request.SolrQueryRequest;
import org.apache.solr.update.processor.UpdateRequestProcessor;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.xml.stream.XMLInputFactory;

/**
 * Add documents to solr using the STAX XML parser, transforming it with XSLT
 * first
 */
public class XsltUpdateRequestHandler extends ContentStreamHandlerBase {
	public static Logger log = LoggerFactory
			.getLogger(XsltUpdateRequestHandler.class);
	public static final XMLErrorLogger xmllog = new XMLErrorLogger(log);

	public static final String UPDATE_PROCESSOR = "update.processor";

	public static final int XSLT_CACHE_DEFAULT = 60;
	private static final String XSLT_CACHE_PARAM = "xsltCacheLifetimeSeconds";

	XMLInputFactory inputFactory;
	private Integer xsltCacheLifetimeSeconds;

	@Override
	public void init(NamedList args) {
		super.init(args);

		inputFactory = XMLInputFactory.newInstance();
		try {
			// The java 1.6 bundled stax parser (sjsxp) does not currently have
			// a thread-safe
			// XMLInputFactory, as that implementation tries to cache and reuse
			// the
			// XMLStreamReader. Setting the parser-specific "reuse-instance"
			// property to false
			// prevents this.
			// All other known open-source stax parsers (and the bea ref impl)
			// have thread-safe factories.
			inputFactory.setProperty("reuse-instance", Boolean.FALSE);
		} catch (IllegalArgumentException ex) {
			// Other implementations will likely throw this exception since
			// "reuse-instance"
			// isimplementation specific.
			log.debug("Unable to set the 'reuse-instance' property for the input chain: "
					+ inputFactory);
		}
		inputFactory.setXMLReporter(xmllog);

		final SolrParams p = SolrParams.toSolrParams(args);
		this.xsltCacheLifetimeSeconds = p.getInt(XSLT_CACHE_PARAM,
				XSLT_CACHE_DEFAULT);
		log.info("xsltCacheLifetimeSeconds=" + xsltCacheLifetimeSeconds);
	}

	@Override
	protected ContentStreamLoader newLoader(SolrQueryRequest req,
			UpdateRequestProcessor processor) {
		return new XsltXMLLoader(processor, inputFactory,
				xsltCacheLifetimeSeconds);
	}

	// ////////////////////// SolrInfoMBeans methods //////////////////////

	@Override
	public String getDescription() {
		return "Add documents with XML, transforming with XSLT first";
	}

	@Override
	public String getVersion() {
		return "$Revision: 1142003 $";
	}

	@Override
	public String getSourceId() {
		return "$Id: XsltUpdateRequestHandler.java 1142003 2011-07-01 17:37:17Z uschindler $";
	}

	@Override
	public String getSource() {
		return "$URL: https://svn.apache.org/repos/asf/lucene/dev/branches/lucene_solr_3_5/solr/core/src/java/org/apache/solr/handler/XsltUpdateRequestHandler.java $";
	}

}
